*{
    margin: 0;
    padding: 0;
  }
  .head1 {
    background-image: url(../images/content02.png);
    background-size: cover;
  /* background-image: linear-gradient(to right, #71baff, rgb(19, 135, 244),  #71baff); */
  width: 1540px;
  height: 240px;
  position: relative;
  top: -50px;
  }
  a {
  text-decoration: none;
  color: #000;
  }
  .top {
  width: 200px;
  color: #ffffff;
  position: relative;
  top: 90px;
  left: 700px;
  font-family: "李旭科毛笔行书", sans-serif;
  font-size: 60px;
  }
  .top2 {
  width: 400px;
  height: 50px;
  border-bottom: solid 3px rgba(234, 198, 20, 0.842);
  font-size: 30px;
  font-family: "隶书 Bold", "隶书", "隶书", sans-serif;
  }
  .top3_1{
  
  position: fixed;
  
  }
  
  .top3 {
  background-color: aquamarine;
  position: relative;
  top: 380px;
  left: 1380px;
  font-family: "隶书 Bold", "隶书", "隶书", sans-serif;
  font-size: 20px;
  color: rgb(0, 0, 0);
  /* top: 70px;
  left: 20px; */
  }
  p{
  width: 1000px;
  padding-top: 20px;
  /* padding-bottom: 20px; */
  
  text-indent: 2em;
  font-family: 仿宋, 楷体;
  letter-spacing: 1px;
  /* 设置字母间距为1像素 */
  line-height: 1.5;
  /* 设置行间距为1.5倍行高 */
  font-size: 16px;
  }
  .left {
  position: relative;
  top: 50px;
  margin-left: 100px;
  width: 1000px;
  height: 2100px;
  
  }
  /* .body_1{
  background-color:black;
  position: absolute;
  top: 0px;
  left: 420px;
  width: 4px;
  height: 2000px;
  } */
  .h3_1{
  position: relative; left: -40px; top: 120px;
  }
  h4{
  
  font-family: "隶书 Bold", "隶书", "隶书", sans-serif;
  margin-top: 30px;
  }
  .directory {
  background-color: #ffffff;
  position: absolute;
  width: 300px;
  height: 300px;
  border: solid 2px black;
  
  left: 1100px;
  top: 0px;
  }
  .DI1 {
  writing-mode: vertical-rl;
  font-size: 30px;
  background-color: #d7d7d7;
  height: 300px;
  width: 100px;
  font-family: "Courier New", Courier, monospace;
  }
  .DI2 {
  width: 200px;
  position: relative;
  top: -300px;
  left: 130px;
  font-size: 25px;
  font-family: "Courier New", Courier, monospace;
  }
  .intro02 {
  position: absolute;
  top: 350px;
  }
  .intro03 {
  position: absolute;
  top: 650px;
  
  }
    .intro03_1{
    position: relative;
    top: 50px;
      width: 1000px;
      height: 300px;
      background-image: url(../images/content01.png);
  
    }
  .intro04 {
  position: absolute;
  top: 1350px;
  }
  .intro05 {
  position: absolute;
  top: 1830px;
  }